leaudio: Make sure attached device has proper metadata (ccid)

Without this patch, late connected device would miss metadata
in the enable command

Bug: 231084798
Bug: 238961038
Bug: 239651157
Sponsor: @siyuanh
Test: atest BluetoothInstrumentationTests
Tag: #feature

Change-Id: I5ca3acb85f4c8db239fb204cbdac920b99eb875c